69 lines
2.4 KiB
Groff
69 lines
2.4 KiB
Groff
.\" -*- nroff -*-
|
|
.\"
|
|
.\" Copyright (c) 1998 Doug Rabson
|
|
.\"
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This program is free software.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd June 16, 1998
|
|
.Dt DEVCLASS 9
|
|
.Os FreeBSD
|
|
.Sh NAME
|
|
.Nm devclass
|
|
.Nd object representing a class of devices
|
|
.Sh SYNOPSIS
|
|
.Vt typedef struct devclass *devclass_t ;
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Dv devclass
|
|
object has two main functions in the system. The first is to manage
|
|
the allocation of unit numbers for device instances and the second is
|
|
to hold the list of device drivers for a particular bus type.
|
|
Each
|
|
.Dv devclass
|
|
has a name and there cannot be two devclasses with the same name.
|
|
This ensures that unique unit numbers are allocated to device
|
|
instances.
|
|
.Pp
|
|
Beware that this means
|
|
.Dv devclass
|
|
must be the same for different bus attachments of the same device driver.
|
|
.Sh SEE ALSO
|
|
.Xr devclass_add_driver 9 ,
|
|
.Xr devclass_delete_driver 9 ,
|
|
.Xr devclass_find 9 ,
|
|
.Xr devclass_find_driver 9 ,
|
|
.Xr devclass_get_device 9 ,
|
|
.Xr devclass_get_devices 9 ,
|
|
.Xr devclass_get_maxunit 9 ,
|
|
.Xr devclass_get_name 9 ,
|
|
.Xr devclass_get_softc 9 ,
|
|
.Xr device 9 ,
|
|
.Xr driver 9
|
|
.Sh AUTHORS
|
|
This man page was written by
|
|
.An Doug Rabson .
|